1 files changed, 3 insertions, 0 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 99dc58e5dcc3..3960560f873a 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -719,6 +719,9 @@ int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str,
                 { .tag  = 0 },
         };
 
+        if (str == NULL)
+                return -1;
+
         val = parse_tag_value(str, tags);
         if (val != (unsigned long) -1) {
                 /* we got file size value */